<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title>Page Title</title>
    <style>
        .div_left
        {
            clear: left;
            background-color: blue;
            margin: 5px;
            padding: 5px;
            width: 300px;
            height: 100px;
        }
        .div_background
        {
            background-color: bisque;
            margin: 5px;
            padding: 5px;
            width: 100%;
            height: 500px;
        }
       .div_right
       {
           background-color: black;
           float: left;
           height: 50px;
           width: 10px;
          
       }
    </style>
</head>
<body>
    <div class="div_background">
            <div class="div_left" >
                </div>
              <div class="div_right"></div>
    </div>
  
</body>
</html>